Nut-lock.



M. KESTER.

NUT LOOK.

APPLICATION FILED JAN.20,1913.

1,081,965, Patented Dec. 23, 1913;

Fig.2.

MARCUS KESTER, OF OLNEY, ILLINOIS.

NUT-LOCK.

Speciflcation'of Letters Patent.

Patented Dec. 23, 1913.

Application filed January 20, 1913. Serial No. 743,177.

T 0 all whom it may concern:

Be it known that I, Marcus Knsrnn, a citizen of the United States, resident of Olney, in the county of Richland and State of Illinois, have made a certain new and useful Invention in Nut-Locks; and I declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertains to make and use the invention, reference being had to the accompanying draw ings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure 1 is a side view of the invention, as applied. Fig. 2 is a similar view partly in section. Fig. 3 is a plan view. Fig. 4 is a plan view with the key adjusted to loosen the coils of the spring.

The invention has relation to nut locks, and it consists in the novel construction and combinations of parts as hereinafter set forth.

In the accompanying drawings illustrating the invention, the numeral 1, designates a bolt having a threaded end portion-2, and 3, is the nut screwed upon the bolt.

4, is a coiled spring surrounding the outer threaded portion of the bolt, said spring having an outward extendin'g inner end portion 5, provided with an angularly bent termination 6, substantially parallel with the axis of the spring, said termination having engagement with the nut, being preferably seated in a corner perforation 7 of the nut.

The coiled spring is preferably of flattened nature, and is designed to have contact with the threads of the bolt to grip said threads in a frictional manner. To this end a straight key 8 is rotatably engaged with the nut, the stem of the key being in axial alinement therewith, having engagement preferably with a straight corner perforation 9, thereof, said key having engagement with an outturned portion 10, of the outer end of the spring to tighten the coils of the spring upon the threads of the bolt. The key being turned to accomplish this tightening, any movement of the nut to loosen the same upon the bolt will be prevented. lrVhen the nut is to be removed from the bolt, the key is turned in the reverse direction to loosen the coils of the spring. The key is preferably flattened or flat sided and has engagement with the outer flattened end of the spring to accomplish the result stated.

The invention may be readily applied to any ordinary nut, is inexpensive of manufacture, and is designed to provide an eflicient lock which may be easily loosened.

When the key is turned to tighten the coils of the spring upon the bolt, as shown in Fig. 3 of thedrawings, the stem 9 of the key engaging the perforation 9, of the nut, will be thrown laterally into frictional engagement with the wall of the perforation to retain the key in position as turned or adjusted, see Fi .2.

What I claim is A nut lock comprising a coiled spring surrounding the thrcaded end of the bolt, said spring having at its inner end connection with the nut, to turn therewith, and an outturned outerend, and a straight key having at its inner end a stem in axial alinement therewith, said stem having rotatable engagement with a straight seat of the nut, said key having at its outer portion engagement with the out-turned end of said spring to tighten the coils of the spring upon the bolt, said stem having frictional engagement with the walls of its seat to prevent reverse movement of the key under strain of the spring.

In testimon whereof I afiix my signature, in presence 0 two witnesses.

MARCUS Knsrnn. Witnesses O. G. RONEY, Gno. Ronw. 

